Heat-controlling system.



E. P. CULVER.

HEAT CONTROLLING SYSTEM.

APPLICATION FILED JAN.17, 1913.

1,063,780. Patented June 3, 1913.

2 SHEETS-SHEET l.

L J W/ INVENTOR Edward F. Cu Iver W637i BY WITNESSES ATTORNEYS E. P. CULVER.

HEAT CONTROLLING SYSTEM.

APPLICATION FILED JAN.17, 1913.

1,063,780. Patented June 3, 1913.

2 SHEETS-SHEET 2.

4: WITNESSES 59 INVENTOR Edward C ulver ATTORNEYS UNITED STATES PATENT OFFICE.

EDWARD P. CULVER, OF SCHENECTADY, NEW YORK.

HEAT-CONTROLLING SYSTEM.

Specification of Ietters Patent.

Patented June 3, 1913.

Application filed January 17,1913. Serial No. 742,612.

The object of my invention is to provide a heat controlling system in which a ther- 5 mostat control is so mterconnected with av of steam exceeding a predetermined maxi- The invention consists of the construction I and combination of parts to be more fully described hereinafter and fully set forth in the claims.

Reference is to be had to the accompanying drawings forming a part of this specification, in which like characters indicate corresponding parts in all the views and in which:

Figure 1 is a side elevation of a boiler provided with an embodiment of my invention, showing the thermostat operating the cooling damper whilev the diaphragm on the boiler is below the maximum expansion; Fig. 2 is a similar elevation showing the thermostat operating the draft damper with the diaphragm still in the same position as in Fig. 1; Fig. 3 is also a side elevation showing the thermostat and the diaphragm both acting independently of each other on the cooling damper; Fig. 4 is a similar side elevation showing the cooling damper con trolled by the diaphragm alone; Fig. 5 is a modified form of connection between the diaphragm and the thermostat mechanism; and Fig. 6 is a diagrammatic view of the mechanism operated by the thermostat.

Referring to the drawings, lo represents a boiler provided with a diaphragm casing 11, the expansion and contraction of which under the pressure of the steam in the boiler controls the dampers of the boiler. A stem 12 is connected to the diaphragm in the easing 11 and is moved by the expansion or contraction of the diaphragm under the steam pressure. Pivotally connected to the sure.

bracket 14 is a lever 13 which is operated by the diaphragm 11 through the medium of the stem 12. The diaphragm in the easing 11 prevents the rise of steam pressure to such a point that the safety valve will blow. It controls through the medium of the stem and its lever 13 the draft and cooling dampers, thereby checkin the fire and preventing the generating o excessive steam pres- The lever 13 has its fulcrum and a bracket 14 attached to the frame of the diaphragm casing 11 so that one side of the lever 13 is, under the action of the diaphragm in the casing 11, a-lever of the third class, and on the other side is a lever of the first class. The end forming the third-class lever is provided with an adjust-able weight 15 for balancing the action of the diaphragm.

The boiler 10 has a cooling damper 16 and a draft damper 16. A chain 17 connects one end of the lever 13 to the cooling damper, while the other end of the lever is connected by means of a chain 18 to the crank 19 of the mechanism 20 controlled by the thermostat 21 positioned in a desired place in the house being heated with this boiler. The chain 18 is provided with a pulley 22 riding on this chain '18 and connected by means of a chain 23 to thedraft damper 16. The chain 18 is also provided with a series of directing pulleys 24, so as the thermostat is positioned has risen above the normal for the thermostat, the same will be thrown into the position shown in Fig. 1. This will operate the cooling damper and thereby reduce the temperature in the furnace and, consequently, in the place where the thermostat is found.

Fig. 2 represents a condition when the temperature in the place where the thermostat is found has fallen below the normal and, consequently, the thermostat is thrown in the opposite direction, as shown in Fig. 2, thereby opening the draft damper and consequently causing the boiler to generate steam more rapidly. In both Figs. 1 and 2 the steam pressure in the boiler had not attained that predetermined value necessary to expand the diaplfragni" against th'e"-- arcs-- of the adjustable weight 15.

Fig. 3 shows a condition where the' that: m e s- 1s s a eeedi ee 9. 3 while the boiler-pressure has 1'1Sli t0 tl1 maximum, and, therefore,rbothzgtheuthermor stat and the diaphragm 11 are independntly v pe 1i g he cooling-1 damp .l igndi a es; a s ndltf heiler P e su e is. ,a-tits. m x m ma her by ,{orcing the lever :13 to operate the-cooling i as t he chains 18 and 23 are so formedthat when the thermostat and lever are in the po:

sition shown in Fig. 4, the draftdamper 16 cannot be operated by the thermostat,

the length of the chains 18 and 23 being such as not to permit its operation.

- The condition of Fig. 4 illustrates an important step. In fact,'the operation now to be explained shows the importance of the invention and clearly differentiates said invention from all other heat controlling systems provided with a thermostat. In case the weather temperature is low or a door or window is left open in the room containing the thermostat, the air temperature near the latter may remain below the normal for, which the thermostat is set, even though the'boiler pressure has attained its safe working limit. Under these conditions each and every thermostat-controlled heat regulating system will hold open the draft damper andleave the cooling damper.

Closed despitethe excessive and rapidly-increasing steam pressure generated within boiler. As a result, the steam pressure soonre'aches the value for whichthe safety valveis set to blow, and the rapidly. gener- .ate d steam escapesthrough said-valve into the atmosphere in such quantities as not only; to. fill the ,space where the boiler is with steam, but also what is more serious, to .16wer the water level. in the boiler'so that I the latter ,wil l:.be;-exp osed to the danger-of". beingfruined b'yoverheating; .In .thesysitem illustrated Fig; 4,. however, when, underthe above condition, the .boiler presj --sur'e=-- reaches that certain predetermined, pressure .su flicient to overco me -.th e;-f orce ex- .ert'ed--uponthe diaphragm by the adjustable weight 15, thepperation of the diaphragm vcloses the-draft damper 16 and opens-the cooling damper 1G, irrespective of, the position of-the thermostat control. Obviously, the'certain predetermined pressure above referredto shall besligh tly-below the-pressure.

atwhichthe safety :valve blows, so that the boiler pressure will always. be below the safety valve blowing pressure.

were

we; 5 ew mpdifiedy of the aeetidmbetweer-the crank 19 and the mechanisn 2Q and the end of the lever 13. In 'p'laceofapu'lley 22 loosely riding on a chain "18' a lever 30 is provided and the chain 23' coniiectsth'e draft damper 16 to th lever .30 intermedi-ete'the ends 31 and; 32 of the lever 30. A chain 33 connectsthe crank 19 to the end 32 of the lever- 3Q,,and,a.cha in 3e eenn e s h end-10 t le er letet PP siteend 31 of -the levei' 30. ;;As indicated in. the. dottedline, it can be, seen,.-that the operationjis similar in Figsgil, 2, 3 and 4- and Fig. 5, and both thepulley and the lie ver 30 constitute levers of the second class.

Fig. 6 shows a diagrammatic illustration of the. operation of the cranks l9 and 25 by means of the thermostat 21. 'I .he cranks 19 and25, as shown in the diagram,- areformed on. a shaft 35, which is'provided with a pinion 36 rigidly secured. to the shaft. and engaged by amok-37 providedwithplungers 38 and. 39 respectively; The plungers 38 and 39 are operated by solenoids 40 and 41,

the solenoids being operated intermittently by means of thebattegy 42 controlled by the thermostat 21. 'As shown in the diagram,

the solenoid 40 is operated when the thermostat 21 contacts with the-binding post 43, and solenoid 41 when the thermostat contacts with the binding posta as can be easily seen in the electric diagram in the figure. v v

While the accompanying drawings show a form of a thermostat mechanism provided witha crank shaft, the operation of the-device may be performed by any form of ther- A mostat; and the point of-control of the diaphragm and the thermostat 0n-- the draft damper can be made in many different forms by any other system of leverage than the one shown inthe drawing. 'It will be:

- also remarked that, whilemy system is here described'in connection with a steam boiler, thesam'efmay bexused with a furnace in which the diaphragm is controlled "by the heat developed inthe furnace.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent; v i v 1 .1. In a heat controlling system, a combi nation of a" boiler having a cooling. damperanda draft damper; a, diaphragm actuated by the pressure of the steam within said boiler; an operative connection between said diaphragm and said coolin damper; a thermostat, having an operative connection to said cooling damper; a connection between .said thermostat and said diaphragm; and an operative connection from sai'd'draft damper to said connection between said diaphragm and said thermostat.

2. In a, heat controlling-system, a combination of a boiler havin 'a cooling damper and a. draft damper; a iaphragm actuated by the pressure of the steam within said boiler; an operative connection between said diaphragm and said cooling damper; a thermostat having an operative connection to said cooling damper; a flexible connection between said thermostat and said dia phragm; and an operative connection from said draft damper to said connection between said diaphragm and said thermostat 3. In a heat controlling system, a combination of a boiler having a cooling damper and a draft damper; a diaphragm actuated by the pressure of the steam within said boiler; said diaphragm being connected to said cooling damper for opening the latter when the diaphragm is actuated in one direction; a thermostat connected to said cooling damper for opening the same independently of Said diaphragm; and means con trolled by said thermostat and said diaphragm connected with said draft damper for operating the same.

4. In a heat controlling system, a combination of a boiler having a cooling damper and a draft damper; a diaphragm actuated by the pressure of the steam within said boiler, said diaphragm being connected to said cooling damper for opening the latter when the diaphragm is actuated in one direction; a thermostat connected to said coolingdamper for opening the same independently of said diaphragm; a flexible connection from said thermostat to said diaphragm; and another flexible connection from said flexible connection to said draft damper for operating the same.

5. In a heat controlling system, a combination of a boiler having a cooling damper and a draft damper; a diaphragm actuated by the pressure of the steam within said boiler,a lever associated with the diaphragm and controlled by the same; a flexible connection from one end of said lever to said cooling damper; a shaft having a pair of oppositely directed cranks; a thermostat for operating said shaft; a flexible connection from one of said cranks to said cooling damper; another flexible connection from an opposite crank to the end of said lever opposite the one connected to said cooling damper; and means connecting said draft damper with said flexible connection between said lever and said crank.

6. In a heat controlling system, a combination of a boiler having a cooling damper and a draft damper; a diaphragm actuated by the pressure of the steam within said boiler; an operative connection between said diaphragm and said cooling damper; a thermostat; an operative connection from said thermostat to said cooling damper and a lover of the second class formed by an operativc connection from said thermostat to one end of said lever; an operative connection from the other end of said lever to said diaphragm; and an operative conncction from said draft damper to said lever intermediate its ends.

7. In a heat controlling system, a combination of a boiler having a cooling damper and a draft damper; a diaphragm actuated by the pressure of the steam within said boiler; an operative connection between said diaphragm and said cooling damper; thermostat having an operative connection to said cooling damper; and a lever of the second class associated with said thermostat, said diaphragm and said draft damper.

8. In a heat controlling system, a combination of a boiler having a cooling damper and a draft damper; a diaphragm actuated by the pressure of the steam within said boiler; an operative connection between said diaphragm and said cooling damper; a thermostat having an operative connection to said cooling damper; a flexible connection between said thermostat and said diaphragm; a pulley loosely mounted on said flexible connection; and an operative connection from said pulley to said draft damper for operating the same.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

EDWARD P. CULVER.

Witnesses:

JOHN ALEXANDER, JANE A. hlYERSr 

